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I was looking at a nifty device, a Snooper MY-SPEED XL, that shows the current speed limit. Now in these days of speed limits changing every couple of yards I thought it could be useful.

It costs around £100.

Then I saw a number of Dash Cams that have GPS that could do the same thing and give me a dash cam for the same price. But the majority only talk about warning of speed cameras - something I tend to disprove of.

Anyone aware of a dash cam that can also tell me the current speed limit? Possibly also beep if I am going too fast.

If only there were regular signs at the side of the road that told you every few seconds what the currently applicable speed limit was, with 100% accuracy. Then there wouldn't be a need for these very fallible gadgets...

If only there were regular signs at the side of the road that told you every few seconds what the currently applicable speed limit was, with 100% accuracy. Then there wouldn't be a need for these very fallible gadgets...

All of these devices are not reliable. They don't respond to temporary speed limits, variable speed limits and sometimes can be over a year or more out of date when a stretch has had its limit changed.

If you rely on them instead of using your eyes and taking notice of the big number on the big stick then you're likely to find yourself with points on your license and "well my Satnav/Snooper etc said the speed limit was 40 officer" won't get you off.

If only there were regular signs at the side of the road that told you every few seconds what the currently applicable speed limit was, with 100% accuracy. Then there wouldn't be a need for these very fallible gadgets...

Our Garmin gives what they think is the speed limit and the speed you are doing goes red if you exceed it.
BUT there are several roads I know of where the limit was reduced some time ago, two years at least, and the Garmin still shows the wrong limit.
Yes it has been updated.

GPS systems that tell you the speed limit, are as (un)reliable as those that tell you where the road is.

Some top-end cars literally read the road signs, but they struggle with :
Vegetation and dirt
Parallel roads, and carriageway repair site limits
Motorway gantries
They also only tell you, just as you pass the sign ; which is awkward, because that's often where the speed cameras are.

See if you can find a system which offers an insurance policy ( say £1000 / point ) if it gives a bad signal which causes a speeding penalty. I bet they all have some sort of disclaimer.

At least every car has a human driver, imagine the chaos if anyone thought of letting computers drive them.

I think you're on to something here. I am wondering if some flashing lights at each side of the car could be fitted so that you could let other drivers and road users know which way you were intending to turn could be a winner too.

True-ish. If you're driving a different type of vehicle, NSL may be different. But that's really just an upper cap - below that NSL for the vehicle type, all the limits apply identically, and the concept of NSL still applies.

In order to display numbers or warn of over-speed, the clever gizmo that knows what the limit is, would often need to know the type of vehicle it is fitted to, or if it has a trailer, or a space-saver spare wheel. Any of these can mean a lower number.

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